cve-2022-48870
Vulnerability from cvelistv5
Published
2024-08-21 06:10
Modified
2024-11-04 12:18
Severity ?
Summary
tty: fix possible null-ptr-defer in spk_ttyio_release
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2da67bff29ab49caafb0766e8b8383b735ff796fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5abbeebd8296c2301023b8dc4b5a6c0d5229b4f5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/64152e05a4de3ebf59f1740a0985a6d5fba0c77bPatch
Impacted products
Vendor Product Version
Linux Linux Version: 5.12
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-48870",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T16:05:32.027830Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-12T17:32:54.375Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/accessibility/speakup/spk_ttyio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2da67bff29ab",
              "status": "affected",
              "version": "4f2a81f3a882",
              "versionType": "git"
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            {
              "lessThan": "64152e05a4de",
              "status": "affected",
              "version": "4f2a81f3a882",
              "versionType": "git"
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            {
              "lessThan": "5abbeebd8296",
              "status": "affected",
              "version": "4f2a81f3a882",
              "versionType": "git"
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/accessibility/speakup/spk_ttyio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.90",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: fix possible null-ptr-defer in spk_ttyio_release\n\nRun the following tests on the qemu platform:\n\nsyzkaller:~# modprobe speakup_audptr\n input: Speakup as /devices/virtual/input/input4\n initialized device: /dev/synth, node (MAJOR 10, MINOR 125)\n speakup 3.1.6: initialized\n synth name on entry is: (null)\n synth probe\n\nspk_ttyio_initialise_ldisc failed because tty_kopen_exclusive returned\nfailed (errno -16), then remove the module, we will get a null-ptr-defer\nproblem, as follow:\n\nsyzkaller:~# modprobe -r speakup_audptr\n releasing synth audptr\n BUG: kernel NULL pointer dereference, address: 0000000000000080\n #PF: supervisor write access in kernel mode\n #PF: error_code(0x0002) - not-present page\n PGD 0 P4D 0\n Oops: 0002 [#1] PREEMPT SMP PTI\n CPU: 2 PID: 204 Comm: modprobe Not tainted 6.1.0-rc6-dirty #1\n RIP: 0010:mutex_lock+0x14/0x30\n Call Trace:\n \u003cTASK\u003e\n  spk_ttyio_release+0x19/0x70 [speakup]\n  synth_release.part.6+0xac/0xc0 [speakup]\n  synth_remove+0x56/0x60 [speakup]\n  __x64_sys_delete_module+0x156/0x250\n  ? fpregs_assert_state_consistent+0x1d/0x50\n  do_syscall_64+0x37/0x90\n  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n \u003c/TASK\u003e\n Modules linked in: speakup_audptr(-) speakup\n Dumping ftrace buffer:\n\nin_synth-\u003edev was not initialized during modprobe, so we add check\nfor in_synth-\u003edev to fix this bug."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-11-04T12:18:12.159Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2da67bff29ab49caafb0766e8b8383b735ff796f"
        },
        {
          "url": "https://git.kernel.org/stable/c/64152e05a4de3ebf59f1740a0985a6d5fba0c77b"
        },
        {
          "url": "https://git.kernel.org/stable/c/5abbeebd8296c2301023b8dc4b5a6c0d5229b4f5"
        }
      ],
      "title": "tty: fix possible null-ptr-defer in spk_ttyio_release",
      "x_generator": {
        "engine": "bippy-9e1c9544281a"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-48870",
    "datePublished": "2024-08-21T06:10:00.678Z",
    "dateReserved": "2024-07-16T11:38:08.921Z",
    "dateUpdated": "2024-11-04T12:18:12.159Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-48870\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-21T07:15:04.143\",\"lastModified\":\"2024-09-06T14:20:52.290\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntty: fix possible null-ptr-defer in spk_ttyio_release\\n\\nRun the following tests on the qemu platform:\\n\\nsyzkaller:~# modprobe speakup_audptr\\n input: Speakup as /devices/virtual/input/input4\\n initialized device: /dev/synth, node (MAJOR 10, MINOR 125)\\n speakup 3.1.6: initialized\\n synth name on entry is: (null)\\n synth probe\\n\\nspk_ttyio_initialise_ldisc failed because tty_kopen_exclusive returned\\nfailed (errno -16), then remove the module, we will get a null-ptr-defer\\nproblem, as follow:\\n\\nsyzkaller:~# modprobe -r speakup_audptr\\n releasing synth audptr\\n BUG: kernel NULL pointer dereference, address: 0000000000000080\\n #PF: supervisor write access in kernel mode\\n #PF: error_code(0x0002) - not-present page\\n PGD 0 P4D 0\\n Oops: 0002 [#1] PREEMPT SMP PTI\\n CPU: 2 PID: 204 Comm: modprobe Not tainted 6.1.0-rc6-dirty #1\\n RIP: 0010:mutex_lock+0x14/0x30\\n Call Trace:\\n \u003cTASK\u003e\\n  spk_ttyio_release+0x19/0x70 [speakup]\\n  synth_release.part.6+0xac/0xc0 [speakup]\\n  synth_remove+0x56/0x60 [speakup]\\n  __x64_sys_delete_module+0x156/0x250\\n  ? fpregs_assert_state_consistent+0x1d/0x50\\n  do_syscall_64+0x37/0x90\\n  entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n \u003c/TASK\u003e\\n Modules linked in: speakup_audptr(-) speakup\\n Dumping ftrace buffer:\\n\\nin_synth-\u003edev was not initialized during modprobe, so we add check\\nfor in_synth-\u003edev to fix this bug.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tty: corrige posible null-ptr-defer en spk_ttyio_release Ejecute las siguientes pruebas en la plataforma qemu: syzkaller:~# modprobe Speakup_audptr input: Speakup as /devices/virtual/input/input4 dispositivo inicializado: /dev/synth, nodo (MAJOR 10, MINOR 125) Speakup 3.1.6: el nombre del sintetizador inicializado en la entrada es: (nulo) la sonda de sintetizador spk_ttyio_initialise_ldisc fall\u00f3 porque tty_kopen_exclusive devolvi\u00f3 un error (errno -16), luego elimine el m\u00f3dulo, obtendremos un problema de aplazamiento de ptr nulo, como sigue: syzkaller:~# modprobe -r Speakup_audptr liberando sintetizador audptr ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 00000000000000080 #PF: acceso de escritura del supervisor en modo kernel #PF: c\u00f3digo_error(0x0002 ) - p\u00e1gina no presente PGD 0 P4D 0 Ups: 0002 [#1] PREEMPT SMP PTI CPU: 2 PID: 204 Comm: modprobe No contaminado 6.1.0-rc6-dirty #1 RIP: 0010:mutex_lock+0x14/0x30 Llamada Seguimiento:  spk_ttyio_release+0x19/0x70 [speakup] synth_release.part.6+0xac/0xc0 [speakup] synth_remove+0x56/0x60 [speakup] __x64_sys_delete_module+0x156/0x250? fpregs_assert_state_consistent+0x1d/0x50 do_syscall_64+0x37/0x90 entry_syscall_64_after_hwframe+0x63/0xcd  m\u00f3dulos vinculados en: sheakup_audptr (-) volcando ftrace b\u00fafer: in_synth-\u0026gt;\u0026gt; nth-\u0026gt; dev para corregir este error.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.12\",\"versionEndExcluding\":\"5.15.90\",\"matchCriteriaId\":\"82544A71-562D-4C2F-B75E-7193C3B97CD0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.8\",\"matchCriteriaId\":\"A6AFE6C9-3F59-4711-B2CF-7D6682FF6BD0\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2da67bff29ab49caafb0766e8b8383b735ff796f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5abbeebd8296c2301023b8dc4b5a6c0d5229b4f5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/64152e05a4de3ebf59f1740a0985a6d5fba0c77b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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